The ownership ranks of professional racing are dominated by fast cars and big money. What's a chiropractor from St. Louis doing in a place like this?

Logan appears unconcerned by the prospect of rebuilding or replacing the motor. He wipes his finger inside the tailpipes and notes there's no oil residue. That's a good sign, he proclaims. If the engine had major damage, there'd be black deposits from oil that leaked into combustion chambers. "We may at worst have to put in rings and gaskets and maybe a piston," he says. "And a valve."

"Of course, it could all be junk inside," he admits, then excuses himself to return some parts he's borrowed. His engine could be a wreck, and he's still racing on a shoestring, but he's content.

Howard Martin

Logan with driver Stevie Reeves. "Lots of people come in trying to make money," says Reeves. "If youre racing for money, you're doing it for the wrong reason. Doc's been around racing. He knows he's not going to get rich doing it."